经验法则

A good rule of thumb is an average of one paper per day.

一个有效的经验法则是每天平均读一篇文献。

A good rule of thumb is that the higher you go, the shorter you should stay.

一个有效的经验法则就是，你去得越高，你呆的时间越短。

As a rule of thumb I would never post more than once a day.

作为一个经验法则，我永远不会超过后每天一次。

As a rule of thumb, after the

作为一个经验法则，在

A good rule of thumb is to brush your teeth before bed.

最好的经验法则是睡觉前要刷牙。

For all the ideas you come up with, there's a rule of thumb: save them.

对于所有你得到的想法，这里有一个经验法则：存储它们。

As a rule of thumb, aim to keep all business letters formal in style.

作为一个经验法则，目的是使所有的正式函件业务风格。

Again, as a rule of thumb, it is always best to resolve as much ambiguity as possible.

同样，作为一个经验法则，最好总是解决尽可能多的歧义性。

A good rule of thumb is to always set the hook by feel, not by sight or sound.

一个好的经验法则是永载钩的感觉，或不健全的景象。

As a rule of thumb, aluminum is three times heavier, but also three times stronger than wood.

作为一个经验法则，铝的3倍重，但也的3倍，比木材。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。